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Cisco ONS 15327 Troubleshooting Guide, R3.4
March 2004
Chapter 2 Alarm Troubleshooting
Alarm Procedures
Note SSM-ST3E is an informational condition. It does not require troubleshooting.
2.6.170 SSM-ST4
• Not Alarmed (NA), Non-Service Affecting (NSA)
The SSM Stratum 4 (ST4) Traceable condition occurs when the synchronization message quality level
is lowered to ST4. The message quality is not used because it is below ST3.
Note SSM-ST4 is an informational condition. It does not require troubleshooting.
2.6.171 SSM-STU
• Not Alarmed (NA), Non-Service Affecting (NSA)
The SSM Synchronization Traceability Unknown (STU) condition occurs when the reporting node is
timed to a reference that does not support SSM, but the ONS 15327 has SSM support enabled. STU can
also occur if the timing source is sending out SSM messages but SSM is not enabled on the ONS 15327.
Procedure: Clear the STU Condition
Step 1 In node view, click the Provisioning > Timing tabs.
Step 2 If Sync Messaging is checked, deselect the box.
Step 3 If Sync Messaging is unchecked, check the box.
Step 4 Click Apply.
Step 5 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC
(1-800-553-2447).
2.6.172 SSM-TNC
• Not Alarmed (NA), Non-Service Affecting (NSA)
The SSM Transit Node Clock (TNC) Traceable condition occurs when the synchronization message
quality level is changed to TNC.
Note SSM-TNC is an informational condition. It does not require troubleshooting.
2.6.173 SWMTXMOD
• Critical (CR), Service Affecting (SA)